\begin{tikzpicture}
    \pgfmathsetmacro{\r}{2}
    \pgfmathsetmacro{\a}{35}
    \tkzDefPoints{0/0/O}
    \tkzDefPoint(180:\r){A}
    \tkzDefPoint(0:\r){B}
    \tkzDefPoint(180+\a:\r){C}
    \tkzDefPoint(\a:\r){D}
    \tkzDefPoint(180-\a:\r){E}

    \tkzDrawSegments(O,A  O,B  O,C  O,D  O,E)
    \tkzLabelPoints[below](B, C, D, O)
    \tkzLabelPoints[left](A, E)
\end{tikzpicture}

